TM 10-8110-202-13&PExplanationItems with these codes are not to be requested/requisi-tioned individually. The parts that make up the assembleditem must be requisitioned or fabricated and assembledat the level of maintenance indicated by the source code.If the 3d position code of the SMR code authorizes youto replace the item, but the source code indicates theitems are assembled at a higher level, order the itemfrom the higher level of maintenance.CodeExplanationXA--Do not requisition an “XA’’-coded item.Order its next higher assembly. (Also,refer to the NOTE below.)XB--If an “XB” item is not available from salvage, order it using the FSCM andpart number given.XC--Installation drawing, diagram, instruction sheet, field service drawing, thatis identified by manufacturer’s part number.XD--Item is not stocked.Order an “XD’’-coded item through normal supply channelsusing the FSCM and part number given, if no NSN is available.(2)NOTECannibalization or controlled exchange, when authorized,may be used as a source of supply for items with the abovesource codes, except for those source coded “XA” or thoseaircraft support items restricted by requirements of AR700-42.Maintenance Code.Maintenance codes tells you the level(s) of mainte-nance authorized to USE and REPAIR support items.The maintenancecodes are entered in the third and fourth positions of the SMR codeas follows:(a) The maintenance code entered in the third position tells youthe lowest maintenance level authorized to remove, replace,and use an item.The maintenance code entered in the thirdposition will indicate authorization to one of the followinglevels of maintenance.CodeApplication/ExplanationC--Crew or operator maintenance done within organizationalor aviation unit maintenance.O--Organizational or aviation unit category can remove,replace, and use the item.F--Direct support or aviation intermediate level can remove,replace, and. use the item.C-3
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